Improvement in ratchet-drills



UNITED STATES PATENT ErrcE.

SIMON INGERSOLL, OF BROOKLYN, NEW YORK, ASSIGNOB TO SAMUEL C. INGERSOLL, OF STAMFORD, CONNECTICUT.

IMPROVEMENT IN RATcH ET'- D RILLS.

` letters of reference marked thereon.

This invention relates to an improvement in ratchet-drills, and has forits object the providing a strong, durable, and effective ratchet-drillwhich shall be simple and cheap in its construction, not liable to getout of repair, and occupying but little space while being operated, sothatit can be used in a smaller space than is required for any of thedrills now in use.

The nature of this invention consists in the use or employment of twostraps or stirrups, through which the socket-shaft for the drill passes,and between which is located theratchet-wheel.

It also consists in the peculiar construction of the lever, which actsas a pawl, and in the combination of the same with the ratchetwheel andshaft.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

Figure I shows a side elevation of my improved ratchet-drill. Fig. II isa plan view of the same with the 'upper stirrup removed.

Letters of like name and kind indicate like parts in each of the gures.

A represents the shaft ofthe drill, on which is cast the ratchet B. Boththe ratchet and shaft are cast or made of malleable iron, and

the ratchet is case-hardened for the purpose of making it more durable.

|l C is the feed-screw, to which the pressure is applied in operatingthe drill.

D D are straps or stirrups, also made of malleable iron or othersuitable metal, located upon the shaft A on each side of theratchetwheel.- Thestraps D D receive the lever or handle E, the innerend of which is a serrated curve, the serrations being made tocorrespond and fit in ythe wheel B, as plainly shown at F in Fig. 2. Y

G is a screw-bolt that secures the handle of the drill between thestraps and serves as a fulcrum for the said handle or lever.

H is a stop-pin, located in the lower strap, that fits in acorresponding hole or socket in the handle. The object of this is tocarry the straps with the lever, when it is thrown back, to obtain afresh hold upon the ratchet, and to prevent the back portion of thehandle or lever from engaging with the wheel when working the drill.

I am aware that the several parts of the device herein described, aswell as the combination of them, is not new, andI therefore make noclaim to either; but

I do claim what I regard as an improvement in the construction of thisdevice, to wit:

Constructing the shaftA and ratchet-wheel B in one piece, andconstructing the handle E and the pawl in one piece, and constructing insaid pawl a series of teeth, as shown at F, to engage with acorresponding series of the teeth on the ratchet-wheel, all as hereinshown and described.

SIMON INGERSOLL.

Witnesses:

JOHN S. THoENroN, JOSEPH N. GoADY.

